Numerical Simulation Of Source&Transport Of Aerosol Particles At Mountain Huang

In order to simulate source&transport difference of aerosol characters in field observation on two kinds of synoptic backgroud on mountain area of east china in spring of2008, WRF model and FLEXPART model were used in this research. SRTM3data from NASA was used in WRF model With the purpose to represent the complex terrain more accurately. Weather elements in Planet Boundart Layer(PBL) from simulation were contrasted to the observational data from19meteorological stations and2sounding stations in the Mt Huang area. Result show that when SRTM3data was used in WRF model, the mean RMSE of2m temperature simulated by the four PBL schemes were all reduced:3.79%(YSU scheme),2.48%(ACM2scheme),3.8%(MYN scheme),0.87%(BL scheme); as to10m wind speed, only the mean RMSE by ACM2scheme was reduced2.28%, while the mean RMSE of YSU,MYN and BL schemes were improved about0.22%,2.32%and2.45%. So we made the conclusion that the SRTM3data with ACM2schems was better for numerical simulation at mountain Huang area. Base on these studies,FLEXPART model combined with WRF out data was used to simulate diffusion and distribution of particles on two kinds of synoptic background. Result show that, in sunny days, particles are mainly from northwest of china in the mesoscale range, especially in the layer which between1000m and1840m, about41.1%of all particles from this layer. In foggy days, particles on middle and low level are mainly from provinces in the southern and the sea, and46.5%particles from the layer between1000m and1840m. While in the local range, the distribution of particles was wide in daytime and narrow at night, which was affected by the atmospheric stratification,wind direction,wind speed and PBL change, more particles were resident on foggy days than which on sunny days.